LIGHT-EMITTING DEVICE AND ELECTRONIC APPARATUS AND ELECTRONIC EQUIPMENT INCLUDING THE LIGHT-EMITTING DEVICE
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United States of America Patent
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Issued Date -
Oct 3, 2024
app pub date -
Oct 20, 2023
filing date -
Mar 24, 2023
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Abstract
A light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the emission layer includes a first compound, a second compound, a transition metal-containing compound, and a delayed fluorescence compound, the first compound being a hole transport material, and the second compound being an electron transport material, the first compound and the second compound form an exciplex, the first compound, the second compound, or any combination thereof is substituted with at least one deuterium, and an absolute value of a triplet charge transfer state-singlet ground state non-radiative decay rate constant of a mixture of the first compound and the second compound is decreased, compared to a case in which the first compound, the second compound, or any combination thereof is not substituted with deuterium.
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